Question: What has four legs, breathes, but doesn't move?
Answer: A baby koala. Baby koalas will cling to their mother when they are first born, depending on their mother to carry them where they need to go or provide them with any other comfort and protection against predators.
Question: My thickness is no more than a few centimeters, yet my depth can span to infinity. Although mundane, I intimidate most animals. When in my presence, you will inevitably follow me. What am I?
Answer: I'm a mirror.